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当前位置: 首页 > 文章 > 黄土高原典型植被覆盖下SPAC系统水量平衡模拟 农业机械学报 2011,42 (5) 79-84
Position: Home > Articles > Water Balance Simulation in SPAC Systems of Slope Lands Covered with Typical Vegetations on Loess Plateau Transactions of the Chinese Society for Agricultural Machinery 2011,42 (5) 79-84

黄土高原典型植被覆盖下SPAC系统水量平衡模拟

作  者：
佘冬立;邵明安;俞双恩
单  位：
河海大学南方地区高效灌排与农业水土环境教育部重点实验室;中国科学院教育部水土保持与生态环境研究中心黄土高原土壤侵蚀与旱地农业国家重点实验室
关键词：
坡耕地;长芒草地;苜蓿草地;水量平衡;SWAP模型
摘  要：
应用土壤-水-大气-植物整合模型(SWAP),在野外观测试验基础上对坡耕地(豆地)、长芒草地和苜蓿草地土壤-植被-大气系统中的水循环进行了数值模拟。结果表明,土壤水分和储水量模拟结果与实测值具有很好的一致性;长芒草地水分收支基本平衡,苜蓿草地的水分支出是坡耕地(豆地)的1.38倍,其中苜蓿的蒸腾耗水量是坡耕地(豆地)的3.88倍,这是引起苜蓿草地群落过度消耗土壤储水而呈现负补偿的主要原因。农地退耕还林还草后会增加SPAC系统水分支出,如果植被群落耗水过大很可能使土壤干化。
译  名：
Water Balance Simulation in SPAC Systems of Slope Lands Covered with Typical Vegetations on Loess Plateau
作  者：
She Dongli1 Shao Ming'an2 Yu Shuang'en1 (1.Key Laboratory of Efficient Irrigation-Drainage and Agricultural Soil-Water Environment in Southern China,Ministry of Education,Hohai University,Nanjing 210098,China 2.State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau,Research Center of Soil and Water Conservation and Ecological Environment,Chinese Academy of Sciences & Ministry of Education,Yangling,Shaanxi 712100,China)
关键词：
Sloping cropland,Stipa bungeana grassland,Alfalfa grassland,Water balance,SWAP model
摘  要：
A numerical model,soil-water-atmosphere-plant model(SWAP),was applied to simulate dynamics of soil moisture and soil-water balance in three kinds of land use patterns,including cropland with mung bean,Stipa bungeana grassland and alfalfa grassland,based on field observations.The predicted values of soil moisture and soil water storage had obviously consistent with the measured values.The water input on Stipa bungeana grassland was roughly equal to the output.The water output on alfalfa grassland was 1.38 times of that on cropland,and the evapotranspiration of alfalfa was 3.88 times of that on cropland with mung bean,which was the main reason causing soil water deficit on alfalfa grassland.So conversion of farmland to forest and grassland regeneration will increase the output of water in the SPAC system,if there is a great deal of water consumption by vegetation community,it will lead to soil desiccation.

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